<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>网页标题</title>
	</head>
	<body>
		
		<script>
			
			
			window.onload = function()
			{
				setInterval(function()
				{
					var r = Math.floor(Math.random()*256);
					var g = Math.floor(Math.random()*256);
					var b = Math.floor(Math.random()*256);
					// rgb(255,0,0)
					document.body.style.backgroundColor =  "rgb("+r+","+g+","+b+")"
				},1000)
			}
			
			
		</script>
	</body>
</html>